Carbureter.



Ci r it. I

p rim use SMKTTEE scorn, or SIDCUP, ENGLAND.

CiltRBIl RETER.

application filed Farah 55% wile-m may concern:

lmownthatl, desert-r BOURDAS SMITH his g at Sidcnp, in the county 01" 7id, have invented certain new provements in Carbureters; do herebydeclare the following to be hear, and exact dest gription of the such aswill enable others skilled to which appertains to make and elates toapparatus for the for lighting, heating and pow nrposes.

1% been ioundin practice that the as consumption of gas, the poorer u'rebecomes, and an air distributer to give correct mixture for a demand ofgas, will not readily give 'xrture for an increased demand. pal objectof this invention is means whereby the correct Y mixture is maintainedirie r tie said mixture.

.1113; to the drawings :Figure 1 is a levatibn oil? carburetor with theside idc n accordance with this ina plan view with the vel coy rremoved, ig. 8 is an inverted plan o v i 1 l tribnter. Fig. 4 is asection Fig. is a cross-sccline C- D in Fig. 4. formed of galvanized ersuitable material is procover l), held in position by .1 nuts 0 andbolts (Z. An inlet pipe 3 preferably to a suitable supply air, conductsthe compressed ihnter j composed of a series oi? tubes 9 open on theirunder side. :7 have their ends closed by end and j, but are incommunication one tr so, as header Z: is trough-shaped cross-section,and it depends from a pipe section 6' which terms a continuation of ill?inlet pipe 0. A hole Z is formed in the We; of the pipe soc ion c forplacing it in communication with thcheadcr is. Also located in the fuelchamber is a float chamber 712 preferably carried on the side of thoehamoer a This c iainber is entirely closed exce 'i't at its under side,which is open to the :luel inplhe chamber a and always subd by it. Anauxiliary air pipe 1 2 com- ,cat-ing "with the pipe c, suppliescompecification of Letters Pateiit.

c demand made on the car it the other a header is at one end of,

Patented Aug. 12 9, 12 3 313.,

Serial No. 56AM.

pressed air to the upper side of the float chamber in, the pressure inthe distributer f and chamber in always therefore being equal. Withinthe float chamber m is located a float 1) preferably formed of a hollowball adapted to float upon the hydrocarbon in the chamber m, whileoutside the chamher is a second and similar float 0 adapted to floatupon the liquid in the chamber at. These floats are both pivotallyconnected to a rod g which is itselfpivotally connected to a valve rodr. The floats 0 and p can seesaw about the rod r without causing amovement to the rod, but should the respective levels of the liquid inthe chambers 04 and m sink, the float end of the rod T will likewisesink and turn the rod r about a pivot 51 carried by a suitable brackett,secured to the base of the chamber a. The end of the rod 7", remotefrom the floats, will therefore rise and lift a valve a, suitablypivoted to and at the end of the rod 1*, from its valve seat c andadmit'tuel to the chamber a, through the inlet w.

The air pipe (1 is provided with swivel joints at a" and y, and with aneye 2 secured to the pipe. A. second eye 1 is secured to one oi thetubes 1. The eye .2' is linked to a rod 2 which is screwed at 3 andpasses through the cover I); an adjusting nut at being adapted to takeonto the screw The eye 1 is likewise linltcd to a, similar rod screwedat 6, upon which screw is an adjusting nut 7.

An oullcl main 8 is provided for conveying away the gas from the upperportion of the chamber a to a suitable storing container, or dircctto asupply system.

A. screw stopper 9 may be provided in the cover l) for replenishing thechamber a with liquid, in addition to the pipe 10.

A gage for visibly ascertaining the amount of fuel in the chamber a maybe providcd, and may consist of a gage glass 1), having connnunicationwith the chamber In above the fuel level at 10 and below the fuel levelat 11.

ln operation, the inlet 6 of the carburetor is suitably connected up toa supply of air under pressure. The main 8 is connected to a gasreceiver or supply system, while the inlet pipe is in communication witha liquid fuel supply. It will be observed that the distributor can turnabout the joint y of the pipe (4 in such a manner that if the rod 5 isscrewed upward by the nut 7 the end of the distributor f beneath it Willbe raised, and if the rod 5 is lowered, the end of the distributor will.also be lowered. Likewise the other end of the distributer can be raisedby the rod 2 and nut t, when the pipe 0 will turn about the joint .r.\Vhen air is admitted to the inlet, it passes along the pipe e, throughthe aperture Z into the distributor tubes g. It then passes through orover the liquid, carrying volatile vapor with it to the upper portion ofthe chamber a. The mixture then passes away by the main 8 to a containeror supply system. The area through which the air passes into thehydrocarbon is decreased or increased, in accordance with the differencein. pressure between the inside and the outside of the distributer f,owing to the inclination of the distributor, which is varied at will.The auxiliary pipe at supplies com pressed air directly from the ipe eto the float chamber m; it will therefore be manitest that the pressureon the surface of the liquid in m will be the same as that on the liquidin the tubes 9. But the pressure on the surface of the liquid outsidethe chamber m and tubes 9 will be less than that in the chamber andtubes; therefore the level of the liquid in the cl'iamber and tubes willvary in the same ratio to the level outside the chamber m and tubes 5 asdo the pressures within and without the chamber and tubes. Consequentlythe float p will be lower, when compressed air is being supplied to thecarbureter, than the lloat 0, and the bar 1 will have assumed an angularposition relatively to the horizontal plane, but no motion will havebeen imparted to the valve rod 1. If however, the mean level of theliquid falls, owing to the volatilizing of the liquid, both floats willmove downward, and the valve rod 2, operated by the rod (1, will liftthe. valve '20 and admit more liquid to the chamber a.

The combined dimensions of the float chamber m and distributor 7''should be such that the superficial area of the liquid within them isapproximately equal to the superficial area of the liquid contained bythe chamber (A The rod 1 should be pivoted atits center to the valve rod1' so that the floats balance, or substantially do so, when notinfluenced by the liquid. in case the superlicial areas of the liquidsdo not coincide with one another, the pivot connecting the rod (1 to thevalve rod 1*, may be made adjustable so that the floats may be adaptedto suit any inequality in the areas.

If desired, suitable means may be employed for heating the carburetor.

lt will be clear that should the demand- For mixture be great, thepressure in the main t and upper portion of the chamber a will bereduced, and consequently the level of the fuel in the cham'larr .rzwill rise. This rising of the fuel in the chamber a is accompanied by acorresponding fall of fuel in the tubes 9', thereby increasing" the areaof escape of the air through the fuel. Consequently the compressed airin the dis tributer will have more fuel to bubble through andconsequently the mixture will be maintained in quality. Should theconverse happen, and the demand for mixture be decreased, a. resultingincreased pressure in the main 8 and chamber a will. take place, and thefuel level in the. chamber a will sink; thus an accon'ipanying rise inthe tubes and chamber m will take place, and therefore a lessening ofthe area and bulk of fuel through which the air passes. Thus it will beseen that supposing for instance, the carbiu'eter is being used inconnection with a petrol lighting system, the carbureter willautomatically maintain the quality of the mixture irrespective of thenumber of burners lighted in the system.

. I claim 1. A carbureter comprising a mixture chamber; a distributerformed of U shaped tubes, open on their under side; means for 9asupplying compressed air to said distribu- 'ter; a mixture outlet fromsaid mixture chamber; a fuel inlet to said mixture cham her; a valvecontrolling said fuel inlet and means for operating said valve accordingto the mean level of the fuel in said mixture chamber and saiddistributor.

2. A carburetor comprising a mixture chamber; a distributor formed of Ushaped tubes open on their under side; means for lot supplyingcompressed air to said distributer; a mixture outlet from said mixturechamber; a fuel inlet to said mixture chamher; a valve controlling saidfuel inlet; a float located insaid mixture chamber; a. float located ina float chamber, said float chamber being adapted to be supplied withcompressed air at the same pressure as said distributer, and means foroperably connecting said floats to said valve.

3. A carburcter comprising a mixture chamber: a distributor formed of Ushaped tubes open on their under side; means for supplying compressedair to said distributcr: a mixture outlet from said mixture 5 chamber; afuel inlet to said mixture chambet: a valve controlling said fuel inlet;a float located in said mixture chamber and connected to one end of abar; a float 10-, catcd in a float chamber supplied with compressed airat the same pressure as said distributor; said float being connected tothe other end of said bar; a lever pivotally connected to said bar atone end, and pivotally connected to said valve at the other end, andadapted to turn about a pivot so as to raise and lower said valve.

1. A carburetor comprising a mixture chambcrj a distributor formed of Ushaped tubes open on their under side; a pipe for supplying compressedair to said distributer; means for raising and lowering said distributerin said mixture chamber; a mixtuie outlet from said mixture chamber; afuel inlet to said'inixture chamber; a valve controlling said fuelinlet; a spherical float located-in said mixture chamber; and connectedto one end of'a bar; a spherical float, connected to the other end ofsaid bar, and located in a float chamber; a pipe forconductingcompressed air to said float chamber from said distributerpipe; a lever p'ivotally and adj ustably connected to said bar at oneend, and 'pivotally connected to said valve at the other end, and abracket 15 carrying a pivot about which said lever is adapted to turn.

In testimony whereof I have aliixed my signature, in presence of twoWitnesses.

JOSEPH BOURDAS SMITH BOOTH.

